Integrated stiffener



FIG. 1 is a front perspective view of the integrated stiffener of thepresent design;

FIG. 2 is a front elevational view thereof, the rear elevational viewbeing a mirror image thereof;

FIG. 3 is a right side elevational view thereof, the left sideelevational view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Broken lines are used to illustrate features of the integrated stiffenerwhich form no part of the claimed design.

CLAIM The ornamental design for an integrated stiffener, as shown anddescribed.